CUVI Features

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This page provides a list of all the functionality available in the latest release of CUVI Library.

Contents

Modules

CUVI comes in following image processing modules.

  • Arithmetic & Logical
  • Color Operations
  • Computer Vision
  • Data Exchange & Initialization
  • Geometry Transforms
  • Image Filtering
  • Image Statistics
  • Image Transforms


Function List

  • Add - Adds two images
  • Adjust - Equivalent to MATLAB's imadjust
  • AND - Logical Bitwise AND
  • BitConversion - Converts image pixel values from one data type to another
  • BorderMask - Masks image borders with custom intensity
  • ChannelMerge - Merges R, G and B Channel to form a color image
  • ChannelSplit - Splits a three channel image into R, G and B channels
  • Color2Gray - Converts an RGB image to gray scale using custom transform coefficients.
  • ColorTwist - Applies a color twist matrix to an image
  • CountInRange - Counts the number of pixels within the given intensity range
  • Crop - Crops the desired portion of an image
  • Demosaic - Restores an RGB image from a gray-scale Bayer image
  • Divide - Divides pixel values of two image buffers
  • EigenValsVecs - Calculates eigen values and eigen vectors at each pixel in an image
  • FlipImage - Mirrors an image about a horizontal or vertical axis, or both
  • GoodFeaturesToTrack - selects N best points on a image using KLT or Harris
  • haarFwd - Performs one-level wavelet decomposition of an image using haar basis
  • haarInv - Performs one-level haar wavelet reconstruction of an image
  • HistEq - Performs histogram equalization
  • ImageBinary - Converts input image into a binary image based on threshold
  • ImageGradients - Calculates X and Y gradients of image
  • ImageFilter - Performs linear 1D and 2D image filtering
  • Max - Computes the maximum of image pixel values
  • MaxFilter - Filters an image using a max filter

intensity values

  • Mean - Computes the mean of image pixel values
  • MeanStdDev - Computes the mean and standard deviation of image pixel values
  • Min - Computes the minimum of image pixel values
  • MinEigenVal - Calculates the minimum eigen value at each pixel in an image
  • MinFilter - Filters an image using a min filter
  • MinMax - Computes the minimum and maximum of image pixel values
  • Multiply - Multiplies pixel values of two image buffers
  • NOT - Performs a bitwise NOT operation on each pixel
  • OpticalFlowHS - Calculates flow of each image pixel in two frames using Horn–Schunck method
  • opticalFlowPyrLKDense - Calculates flow of each image pixel in two frames using pyramidal Lucas–Kanade method
  • OR - Combines corresponding pixels of two image buffers by a bitwise OR operation
  • Resize - Resizes input image using linear-interpolation
  • RGB2Gray - Converts an RGB image to gray scale using fixed transform coefficients.
  • RGB2YUV - Convert RGB image to YUV color model
  • RGBA2Gray - Converts an RGBA image to gray scale using fixed transform
  • Rotate - Rotates an image about origin (0,0) or center
  • Subtract - Subtracts pixel values of two image buffers
  • Sum - Computes the sum of image pixel values
  • TrackFeatures - Tracks input features from frame 1 onto frame 2 using KLT method
  • Transpose - Takes Transpose of the image
  • XOR - Combines corresponding pixels of two image buffers by a bitwise XOR operation
  • YUV2RGB - Convert YUV color model to an RGB image


CUVI Core

CUVI Core includes the following helper functionality:

CuviImage

A C++ class to hold image data on the device. It has the following methods

  • CuviImage(); - default constructor
  • CuviImage(CuviSize size, Cuvi32u depth, Cuvi32u channels) - Main Constructor. throws exception in case of failure
  • CuviImage(const CuviImage&) - copy constructor
  • CuviImage(const CuviMat&) - copy constructor to initialize from CuviMat
  • Upload(void* pSrcHost, size_t srcPitch, CuviStream* stream = NULL) - Copy image data from host to device. Async operation supported
  • Download(void* pDstHost, size_t dstPitch, CuviStream* stream = NULL) - Copy image data from device to host
  • Show(char* title = "CUVI Image",int milliseconds = 0) - Render device image directly on the screen
  • ~CuviImage() - Destructor. Frees Device Memory. throws exception in case of failure

Timer

CUVI provides a C++ Timer class that accurately profiles your application timing

  • Start() - Starts the timer.
  • Stop() - Stops the timer
  • Reset() - Resets the timer
  • GetElapsedTime() - Returns the elapsed time between Start and Stop calls in seconds

DeviceProperties

CuviDeviceProperties holds all the important properties of underlying CUDA device. Device management functions are present inside the namespace cuvi::device.

  • Cuvi32s getDeviceCount() - Gives the count of devices installed in the machine
  • Cuvi32s getCurentDevice() - Returns the ID of selected graphics card
  • CuviStatus setCurrentDevice(const Cuvi32s ID) - Makes any device an active device
  • CuviStatus getDeviceProperties(const Cuvi32s deviceID, CuviDeviceProperties& props) - Returns all the important properties of desired GPU
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